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Title:
LAMINATED IRON CORE MANUFACTURING METHOD AND LAMINATED IRON CORE
Document Type and Number:
WIPO Patent Application WO/2022/196359
Kind Code:
A1
Abstract:
This invention heightens the lengthwise mechanical interlocking rigidness of interlocking sections, and the thicknesswise mechanical interlocking force of iron core pieces. In this method of manufacturing a laminated iron core, a laminated iron core is manufactured by mutually fitting together elongate interlocking sections (18), which are formed in respective iron core pieces (16) by press working, to laminate and fix the iron core pieces to each other. Forming the interlocking section (18) involves forming: a planar section (20) that is connected to a main body (17) of an iron core piece (16), that is recessed with respect to a face (16A) of the iron core piece (16) which is on one side in the thickness direction, that protrudes with respect to a face (16B) of the iron core piece (16) which is on another side in the thickness direction, and that is parallel to the faces (16A, 16B); and a pair of extended sections (22) that include a pair of sloped sections (23) which extend out obliquely from two ends, along the lengthwise direction of the interlocking section (18), of the planar section (20), toward mutually opposite sides in the lengthwise direction and toward the other side in the thickness direction. Forming the pair of sloped sections (23) involves extending the sloped sections (23) in the foregoing oblique directions.

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Inventors:
HIRAMA MICHINOBU (JP)
HAGIWARA TAKESHI (JP)
Application Number:
PCT/JP2022/008852
Publication Date:
September 22, 2022
Filing Date:
March 02, 2022
Export Citation:
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Assignee:
NHK SPRING CO LTD (JP)
International Classes:
H02K15/02; B21D28/02; H02K1/18
Domestic Patent References:
WO2008023448A12008-02-28
Foreign References:
JPH07185695A1995-07-25
US20120169175A12012-07-05
JP2011125141A2011-06-23
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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